our jack russel gets on great with my ferts, simply get yourself some ferret malt paste from the pet shop, ferrets love it, so do dogs, with the ferret/s in cage, stick some on your finger,through the bars letting the ferts lick it off, then some to the pup, pretty soon you'll have the ferts one side of wire, pup the other both licking at same time, over a period of time, get the ferrets out of cage and do the paste again, our jack now loves the ferrets, as she knows when theres ferrets about, she'll either get the paste, or rabbit